A skinny person is far more likely to be healthier than an obese person.

I have a secret that I use to keep myself healthy because I watched as most everyone else in my family struggled with obesity and its related health issues.

But your comment reminds me of the times I overhear the ladies in the office trash-talking another coworker who decided to lose weight and become healthier. I've honest to god heard morbidly obese coworkers try to justify their size and claim that they are in fact healthier than our skinny coworkers.